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Earnings per Share (Tables)
 3 Months Ended
Apr. 02, 2023
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings per Share

The following table sets forth the computation of basic and diluted earnings per share:

  
Three Months Ended
  
(in millions, except per share data)
  
Apr. 2,
2023
    
Apr. 3,
2022
  
Net income attributable to Minerals Technologies Inc.
  
$
37.0
    
$
44.1
  
                 
Weighted average shares outstanding
    
32.5
      
33.1
  
Dilutive effect of stock options and deferred restricted stock units
    
—
      
0.1
  
Weighted average shares outstanding, adjusted
    
32.5
      
33.2
  
                 
Basic earnings per share attributable to Minerals Technologies Inc.
  
$
1.14
    
$
1.33
  
                 
Diluted earnings per share attributable to Minerals Technologies Inc.
  
$
1.14
    
$
1.33